Louis Ross (right), foster father of missing 5-year-old Hasanni Campbell, holds a photograph of Hasanni while addressing the media while Jennifer Campbell (left), foster mother and aunt of 5-year-old Hasanni Campbell, listens during a vigil in back of the store where he was supposedly last seen, Shuz of Rockridge. in Oakland, Calif. on Monday, August 17, 2009. less

Louis Ross (right), foster father of missing 5-year-old Hasanni Campbell, holds a photograph of Hasanni while addressing the media while Jennifer Campbell (left), foster mother and aunt of 5-year-old Hasanni ... more

Photo: Lea Suzuki, The Chronicle

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On Aug 10, 2009, Hasanni Campbell was reported missing from the area of 6000 College Ave. Campbell was last seen wearing a grey sweatshirt and grey pants and has difficulty walking. Campbell is disabled with leg braces and suffers from cerebral palsy. less

On Aug 10, 2009, Hasanni Campbell was reported missing from the area of 6000 College Ave. Campbell was last seen wearing a grey sweatshirt and grey pants and has difficulty walking. Campbell is disabled with ... more

Photo: Oakland Police Dept.

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Howard Jordan, left, the acting Oakland police chief, reads a statement regarding the Hassani Campbell criminal investigation as Jeff Thomason, right, the police public information officer listens during a news conference in Oakland, Calif., Tuesday, Sept. 1, 2009. Criminal charges will not be filed against an Oakland man who was arrested on suspicion of murdering his fiancee's disabled foster child. Alameda County Assistant District Attorney Tom Rogers says there's insufficient evidence against Louis Ross in the Aug. 10 disappearance of Hasanni Campbell, of Fremont, Calif. (AP Photo/Eric Risberg) less

The foster parents of Hasanni Campbell proclaimed their innocence outside jail, saying they had nothing to do with the 5-year-old Fremont boy's disappearance and attacking the tactics of police investigators who believe their son is dead and suspect them of being involved in his killing.

Louis Ross, 38, was released from Santa Rita Jail in Dublin on Tuesday evening after Alameda County prosecutors declined to file a murder charge against him. A day earlier, Ross' fiancee, Jennifer Campbell, 33, was released from the jail, where she had been held on suspicion of being an accessory to murder.

Campbell, who is pregnant with Ross' child, returned to the jail Tuesday to accompany Ross as he was released.

Ross told police that he last saw Hasanni on Aug. 10 outside a shoe store on Oakland's College Avenue where Campbell, the boy's aunt, works. He said he believes someone kidnapped the boy, who has cerebral palsy.

But acting Police Chief Howard Jordan said at a news conference Tuesday, "We know for a fact that Hasanni Campbell never made it to Oakland on Aug. 10 to College Avenue."

Outside jail Tuesday evening, Ross said told reporters that he was angry at the couple's treatment by police and called the investigation "irrelevant."

"I trusted their work, but they've shown through their actions their work cannot be trusted," Ross said. "They've shown through their actions they have an agenda."

Ross said he had repeated his account to investigators of what he did before Hasanni disappeared. He says he last saw the boy near the back entrance to the College Avenue shoe store, as Ross was heading to the front door.

"They got the same story, but they were not happy with the story that they got," he said. "They wanted something else."

Campbell agreed, saying, "There's nothing to arrest us for. I don't know what type of evidence they plan to come up with or what they plan to do, and I'll leave their investigation alone. I know I'm innocent, and I know Louis is innocent."

At the police news conference, officials released a DVD and photos showing Hasanni, his 1-year-old sister, Ross and Campbell shopping at a Walmart in Fremont on Aug. 6. The images were taken from store surveillance cameras.

Officer Jeff Thomason, a police spokesman, said the Walmart trip is "the last time that we have independent information about Hasanni Campbell being alive."

Ross and Campbell said they were the ones who gave the police the information about the shopping trip.

"I gave them a catalog of this, and I supplied them with proof," Ross said. "I said, 'As a matter of fact, here's a receipt. Check the time-date stamp. Look at the video. You'll see him there - you'll see all of us there.' "

Ross said that after police arrested Campbell at the Union City BART Station on Friday afternoon, officers using her cell phone sent him a text message in hopes of coaxing him out of his home on Roxie Terrace in Fremont. Ross said officers with "automatic weapons" eventually ordered him outside.

"You do not destroy people, tear them down or destroy families so you can prove that you were right," Ross said.

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